Detaching-hook.



C. HUNT.

DETACHING HOOK.

APPLICATION FILED MAYH, 191s.

Patented J an. 1, 1918.

2 SHEETSSHEET I.

WITNESSES.

C. HUNT.

DETACHING HOOK.

APPLICATION FILED MAYI], 1916.

1 ,25 1 5 3 1 Patented Jan. 1, 1918.

2 SHEETS SHEET 2.

INVENTOR UNITED STATES PATENT OFFICE.

CHARLES HUNT, OF NEW YORK, N. Y.

DETACHING-HO OK.

Application filed May 17, 1916.

T 0 all whom it may concern:

Be it known that I, CHARLES HUNT, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented new and useful Improvements in Detaching-Hooks, of which the following is a description.

This invention relates to hooks for sustaining heavy objects and, particularly, to detaching hooks for cranes, derricks and other apparatus, by means of which the object sustained or carried may be released, dropped or detached at any time or place desired.

Among the objects of my invention may be noted the following: to provide a hook for supporting and conveying heavy objects, such as machinery, bales, beams, boats, and heavy tools which it is desired to lift or transport from place to place, and to which said hook may be quickly attached and from which it may be quickly detached; to provide a hook of the kind noted which may be quickly released from the object supported, at any time or place, by an operative under whose control the supported object is being conveyed; to provide a detaching hook which, when in use, is securely locked and which, when desired, may be tripped to release the object supported thereby; and to provide a strong, simple, compact and effective hook for the foregoing purposes which is cheap to construct and easily applied and detached.

With the above objects in view, and others which will be detailed during the course of this description, my invention consists in the parts, features, elements and combinations thereof hereinafter described and claimed.

In order that my invention may be clearly understood, I have provided drawings wherein:

Figure 1 is a side elevation of a detaching hook embodying my invention and showing the same in use;

Fig.2 is a sectional elevation taken substantially on the line '22 of Fig. 3, the same being shown .in released or open position;

Fig. 3fis an elevation of the left end of the hook hown in 'Fig. 1;

' Fig. 4 is a sectional view substantially on the line 4-4 of Fig. 1; and

Fig. 5 is a bottom plan view of thedev'ice as shown in Fig. 3.

Specification of Letters Patent.

Patented Jan. 1, 1918.

Serial No. 98,008.

Referring to the drawings, the numerals 1 and 2 indicate, respectively, the two frame members which are given substantially a triangular form and which are bolted firmly together at three points, as by pins 3, 1 and 5, said bolts or pins serving also as supports for other members presently described. The wo frame members 1 and 2 are provided with deep notches, indicated at 6, in the base thereof and extending toward the supportmg ring 7, said notches forming the receptacle for the bail, handle, hook, cable or other means formed on, or secured to, the ob ect to be supported, the same being indicated conventionally by the member indi cated at 8. The supporting ring 7 is secured at the top of the two frame members be tween the same, and the hub 9 of said ring acts as a spacing member for the tw frame members 1 and 2. The supporting ring 7 and the frame members 1 and 2 are keyed together and to the pin 8 by the key-bar 10, so that the ring and frame members can have no relative movement. The ring is ordinarily engaged by a hook, cable, chain, ring or other member 11 when the hook is in use. The holding member 12 of the device is formed with the depression 13 in its up per face and with the shouldered or notched end 1-1, said holding member 12 being piv otally supported by the bolt 1, so as to swing freely into and out of operative position. The depression 13 serves to center or hold the supported object from slipping. The hub 15 of the holding member 12 operates as a spacing device for the frame members 1 and 2. A gravital latch member 16 is pivoted upon the bolt 5 between the two frame members and substantially midway and at one side of the same, and is provided with a weighted extension 17 and latch or supporting end 18, the latter being adapted to cooperate with the shouldered end 14 of the supporting member 12 to hold the latter in operative position, as shown in Fig. 1. The latch member 16 is provided at a suitable point with a laterally extending pin 19 adapted to cooperate with a hook 20 of the controlling member 21, fixedto the bolt 22 on the outer, squared end 23 of which is fixed the operating arm 21 having at its free end an apertured ring or other means 25 for engagement with the manipulating cable 26. The controlling member 21 has the ogee curved cam surface 27 which terminates at the hook 20, the notch of which latter is entered by the pin 19. The bolt 22 is journaled in the lower portion of the frame members 1 and 2 substantially in the same horizontal plane with the pivotal support of the holding member 12. The said controlling member 21 has its field of operation between the frame members 1 and 2, and below the pivot 5 of the latch 16 and between the pin 19 of the latter and the fixed shoulder or surface 28, provided by offsetting the frame member 2 at the point 29 below the bolt 3 and to one side of the latter. By offsetting the frame member 2, ample space is provided for the free operation of the gravital latch and controlling member. The surface 30 of the member 21 engages the surface 28 of the frame member and is thus limited in its movement in that direction. In the opposite direction, the cam member is limited by the pin 19, carried by the latch 16, said pin primarily riding over the cam surface 27 until engaged and stopped by the hook 20. This is due to the fact that the weight 17 of the latch 16 compels the latter to normally hang or swing in the position shown in Fig. 1, which is its functional position, in cooperation with the holding member 12.

From the foregoing, the following mode of operation will be readily understood. As before stated, the latch member 16, by reason of its weight 17, normally hangs in the operative position shown in Fig. 1 and sustains the controlling member, as shown, and the arm 24 substantially vertical; and, normally, the holding member 12 will hang down or in the open position shown in Fig. 2. The controlling member 21 is capable of swinging from the position of Fig. 1 to a position substantially diametrically opposite; but, with the detaching hook in proper operative position or suspension, as shown in Fig. 1, the latch member 16 will prevent the controlling member from swinging clear around by reason of its pin 19-interposed in the path of movement of said controlling member. Hence, operatively speaking, the controlling member is limited in its movement between the surface 28 of the frame and the pin 19 when in the position shown in Fig. 2, which is the full releasing condition or position of the detaching hook. \Vhen the parts are in operative position with the holding member 12 lifted from the position of Fig. 2 to that of Fig. 1, the latch will, naturally, as by gravity, swing under the holding member, so that the cooperating ends 14 and 18 of the two members will interlock, thus enabling the holding member to be held and suspended by the latch in operative position. The holding member is thus normally sustained by the gravital latch until the latter is positively shifted. This condition is maintained until the controlling member is manipulated, as by the cable 26, and arm 24-, to shift the latch member from cooperative engagement with the holding member. This is accomplished by moving the arm 21- from the position of Fig. 1 to that of Fig. 2 causing the cam surface 27 to operate against the pin 19 and force the latch member from the position of Fig. 1 to the position of Fig. 2. The limit of this movement is reached when the pin 19 engages the hook 20 of the controlling member, and the parts will be maintained in that relation, as shown in Fig. 2, until reverse movement of the arm 2 1. Thus the latch member 16, through its pin 19, limits the movement of the arm 21 and the controlling member 21, and the latter limits the movement of t 12 latch member 16 and holds the latter by coo aeration of the pin 19 and hook 20. @rdinarily, the weight imposed upon the holding member by the object supported or conveyed will firmly lock the holding member and latch member in cooperation with a tremendous power which, under ordinary circumstances, cannot be disturbed. It requires a strong pull upon the cable 26 to disturb this cooperative relation. Once sufficiently disturbed, however, as set forth in the foregoing, the weight imposed upon the member 12, or the weight of the latter alone, will open the detaching hook and permit the object supported or conveyed to be dropped or deposited where and as desired. It will be understood that the detaching hook may be quickly applied to the object to be supported or conveyed by entering the member 8 thereof into the recess 6 of the detaching hook and then lifting the holding member 12 into the position of Fig. 1, whereupon the latch 16 may readily be set by push.- ing the controlling member out of the way. The cooperation of the holding member and latch is maintained by two means, the weight of the holding member and gravity operating upon the latch; and the members are, in operation, firmly locked together by the weight sustained thereby.

Having thus described my invention, what 1 claim and desire to secure by Letters Pattent is:

1. A detaching hook having, in combination, a supporting frame; a gravital holding member pivotally carried by said frame and adapted to automatically open without pres sure thereon; a gravital latch pivotally supported by said frame and adapted to automatically engage the supporting member; and a controlling member for shifting the latch to disengage the same from the holding member. 1

2. A detaching hook comprising a supporting frame, said frame having a recess; a gravital holding member adapted to close said recess; a gravital latch adapted to automatically engage the holding member when the latter is in position to close the recess;

and controlling means for breaking the connection between the latch and the holding member.

3. A detaching hook comprising two spaced apart frame members; a gravital holding member pivotally supported between said frame members; a gravital latch pivotally supported between said frame members; and a controlling member pivotally supported between said frame members the relation of the several members being such that the holding member and the latch may be engaged, so that the latter may hold the former, and the controlling member may be swung into engagement with the latch to break the cooperative connection between the latch and the holding member.

4. A detaching hook comprising a supporting frame; a pivotally supported gravital holding member; a gravital latch having means for engaging the holding member to support the latter in operative position; and

a controlling cam member having means for shifting the gravital latch to release the holding member.

5. A detaching hook comprising a supporting frame; a pivotally supported holding member; a pivotally supported gravital latch having a pin extending at an angle therefrom; a controlling cam provided with a hook for engaging the pin to primarily shift the latch and secondarily hold the same through the medium of the said hook and pin; and means for actuating said controlling cam.

6. A detaching hook comprising a supporting frame; means for suspending the same; a gravital holding member carried by the frame and adapted to normally swing open; a gravital latch for sustaining the holding member in operative position; and controlling means for tripping the latch to release the holding member.

CHARLES HUNT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents, Washington, D. C. 

